include/net/if_inet6.h

   1 /*
   2  *      inet6 interface/address list definitions
   3  *      Linux INET6 implementation
   4  *
   5  *      Authors:
   6  *      Pedro Roque             <roque@di.fc.ul.pt>
   7  *
   8  *
   9  *      This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License
  11  *      as published by the Free Software Foundation; either version
  12  *      2 of the License, or (at your option) any later version.
  13  */
  14
  15 #ifndef _NET_IF_INET6_H
  16 #define _NET_IF_INET6_H
  17
  18 #include <net/snmp.h>
  19 #include <linux/ipv6.h>
  20
  21 /* inet6_dev.if_flags */
  22
  23 #define IF_RA_OTHERCONF 0x80
  24 #define IF_RA_MANAGED   0x40
  25 #define IF_RA_RCVD      0x20
  26 #define IF_RS_SENT      0x10
  27 #define IF_READY        0x80000000
  28
  29 /* prefix flags */
  30 #define IF_PREFIX_ONLINK        0x01
  31 #define IF_PREFIX_AUTOCONF      0x02
  32
  33 enum {
  34         INET6_IFADDR_STATE_PREDAD,
  35         INET6_IFADDR_STATE_DAD,
  36         INET6_IFADDR_STATE_POSTDAD,
  37         INET6_IFADDR_STATE_ERRDAD,
  38         INET6_IFADDR_STATE_DEAD,
  39 };
  40
  41 struct inet6_ifaddr {
  42         struct in6_addr         addr;
  43         __u32                   prefix_len;
  44
  45         /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
  46         __u32                   valid_lft;
  47         __u32                   prefered_lft;
  48         atomic_t                refcnt;
  49         spinlock_t              lock;
  50         spinlock_t              state_lock;
  51
  52         int                     state;
  53
  54         __u32                   flags;
  55         __u8                    dad_probes;
  56
  57         __u16                   scope;
  58
  59         unsigned long           cstamp; /* created timestamp */
  60         unsigned long           tstamp; /* updated timestamp */
  61
  62         struct delayed_work     dad_work;
  63
  64         struct inet6_dev        *idev;
  65         struct rt6_info         *rt;
  66
  67         struct hlist_node       addr_lst;
  68         struct list_head        if_list;
  69
  70         struct list_head        tmp_list;
  71         struct inet6_ifaddr     *ifpub;
  72         int                     regen_count;
  73
  74         bool                    tokenized;
  75
  76         struct rcu_head         rcu;
  77         struct in6_addr         peer_addr;
  78 };
  79
  80 struct ip6_sf_socklist {
  81         unsigned int            sl_max;
  82         unsigned int            sl_count;
  83         struct in6_addr         sl_addr[0];
  84 };
  85
  86 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
  87         (count) * sizeof(struct in6_addr))
  88
  89 #define IP6_SFBLOCK     10      /* allocate this many at once */
  90
  91 struct ipv6_mc_socklist {
  92         struct in6_addr         addr;
  93         int                     ifindex;
  94         struct ipv6_mc_socklist __rcu *next;
  95         rwlock_t                sflock;
  96         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
  97         struct ip6_sf_socklist  *sflist;
  98         struct rcu_head         rcu;
  99 };
 100
 101 struct ip6_sf_list {
 102         struct ip6_sf_list      *sf_next;
 103         struct in6_addr         sf_addr;
 104         unsigned long           sf_count[2];    /* include/exclude counts */
 105         unsigned char           sf_gsresp;      /* include in g & s response? */
 106         unsigned char           sf_oldin;       /* change state */
 107         unsigned char           sf_crcount;     /* retrans. left to send */
 108 };
 109
 110 #define MAF_TIMER_RUNNING       0x01
 111 #define MAF_LAST_REPORTER       0x02
 112 #define MAF_LOADED              0x04
 113 #define MAF_NOREPORT            0x08
 114 #define MAF_GSQUERY             0x10
 115
 116 struct ifmcaddr6 {
 117         struct in6_addr         mca_addr;
 118         struct inet6_dev        *idev;
 119         struct ifmcaddr6        *next;
 120         struct ip6_sf_list      *mca_sources;
 121         struct ip6_sf_list      *mca_tomb;
 122         unsigned int            mca_sfmode;
 123         unsigned char           mca_crcount;
 124         unsigned long           mca_sfcount[2];
 125         struct timer_list       mca_timer;
 126         unsigned int            mca_flags;
 127         int                     mca_users;
 128         atomic_t                mca_refcnt;
 129         spinlock_t              mca_lock;
 130         unsigned long           mca_cstamp;
 131         unsigned long           mca_tstamp;
 132 };
 133
 134 /* Anycast stuff */
 135
 136 struct ipv6_ac_socklist {
 137         struct in6_addr         acl_addr;
 138         int                     acl_ifindex;
 139         struct ipv6_ac_socklist *acl_next;
 140 };
 141
 142 struct ifacaddr6 {
 143         struct in6_addr         aca_addr;
 144         struct inet6_dev        *aca_idev;
 145         struct rt6_info         *aca_rt;
 146         struct ifacaddr6        *aca_next;
 147         int                     aca_users;
 148         atomic_t                aca_refcnt;
 149         unsigned long           aca_cstamp;
 150         unsigned long           aca_tstamp;
 151 };
 152
 153 #define IFA_HOST        IPV6_ADDR_LOOPBACK
 154 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
 155 #define IFA_SITE        IPV6_ADDR_SITELOCAL
 156
 157 struct ipv6_devstat {
 158         struct proc_dir_entry   *proc_dir_entry;
 159         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
 160         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
 161         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
 162 };
 163
 164 struct inet6_dev {
 165         struct net_device       *dev;
 166
 167         struct list_head        addr_list;
 168
 169         struct ifmcaddr6        *mc_list;
 170         struct ifmcaddr6        *mc_tomb;
 171         spinlock_t              mc_lock;
 172
 173         unsigned char           mc_qrv;         /* Query Robustness Variable */
 174         unsigned char           mc_gq_running;
 175         unsigned char           mc_ifc_count;
 176         unsigned char           mc_dad_count;
 177
 178         unsigned long           mc_v1_seen;     /* Max time we stay in MLDv1 mode */
 179         unsigned long           mc_qi;          /* Query Interval */
 180         unsigned long           mc_qri;         /* Query Response Interval */
 181         unsigned long           mc_maxdelay;
 182
 183         struct timer_list       mc_gq_timer;    /* general query timer */
 184         struct timer_list       mc_ifc_timer;   /* interface change timer */
 185         struct timer_list       mc_dad_timer;   /* dad complete mc timer */
 186
 187         struct ifacaddr6        *ac_list;
 188         rwlock_t                lock;
 189         atomic_t                refcnt;
 190         __u32                   if_flags;
 191         int                     dead;
 192
 193         u8                      rndid[8];
 194         struct timer_list       regen_timer;
 195         struct list_head        tempaddr_list;
 196
 197         struct in6_addr         token;
 198
 199         struct neigh_parms      *nd_parms;
 200         struct ipv6_devconf     cnf;
 201         struct ipv6_devstat     stats;
 202
 203         struct timer_list       rs_timer;
 204         __u8                    rs_probes;
 205
 206         __u8                    addr_gen_mode;
 207         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
 208         struct rcu_head         rcu;
 209 };
 210
 211 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
 212 {
 213         /*
 214          *      +-------+-------+-------+-------+-------+-------+
 215          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
 216          *      +-------+-------+-------+-------+-------+-------+
 217          */
 218
 219         buf[0]= 0x33;
 220         buf[1]= 0x33;
 221
 222         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
 223 }
 224
 225 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
 226 {
 227         buf[0] = 0x00;
 228 }
 229
 230 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
 231                                   const unsigned char *broadcast, char *buf)
 232 {
 233         unsigned char scope = broadcast[5] & 0xF;
 234
 235         buf[0]  = 0;            /* Reserved */
 236         buf[1]  = 0xff;         /* Multicast QPN */
 237         buf[2]  = 0xff;
 238         buf[3]  = 0xff;
 239         buf[4]  = 0xff;
 240         buf[5]  = 0x10 | scope; /* scope from broadcast address */
 241         buf[6]  = 0x60;         /* IPv6 signature */
 242         buf[7]  = 0x1b;
 243         buf[8]  = broadcast[8]; /* P_Key */
 244         buf[9]  = broadcast[9];
 245         memcpy(buf + 10, addr->s6_addr + 6, 10);
 246 }
 247
 248 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
 249                                     const unsigned char *broadcast, char *buf)
 250 {
 251         if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
 252                 memcpy(buf, broadcast, 4);
 253         } else {
 254                 /* v4mapped? */
 255                 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
 256                      (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
 257                         return -EINVAL;
 258                 memcpy(buf, &addr->s6_addr32[3], 4);
 259         }
 260         return 0;
 261 }
 262
 263 #endif